John gates



J. GATES.

PIsToN PAGKING.

Patente'dfNov. 8, 1870.

| l Illlllll l llllllm ttittr nde- JOHN GATES, or PORTLAND., OREGON.

Letters Patent No. 108,999, dated November 8, 1870.

IMPROVEMENT IN PISTON-PACKlNGS- The Schedule referred to in these Letters Patent and making parl: vof the same.

To all vwhom fit may concern Be it known that I, JOHN GATES, of Portland, in the county of Multnomah and State of Oregon, have invented a new and improved Piston-Packing; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference heilig had to the accompanying drawing forming part of this specfication,in which- Fignre l represents a transverse section ot' my improve-d piston-packing.

Figure 2 is a plan or end view ofthe same.

Figure 3 is an edge view ofthe inner ring.

Figures 4, 5, and 6, are detail side views ofthe sections which comprise the inner ring.

Similar letters of reference indicate corresponding parts.

The object of this invent-ion is to provide an elastic and steam-tight piston-packing which is composed of sectional rings in such manner that the-same may be spread apart by means of an inner spring.

The invention consists in the arrangement of webs and dowel-pius on the inner ring, and of ears ou the spring, and notches on the outer ring, all for the pur ose ot' rodncin a sim ileand eiicent elastic )ackl mg. A Y

The interior ring A is composed of three or more sections, and has the full width ofthe piston-packing,

su as to receive the end plates of the piston on its edges.

Each of the outer rings B is composed of t-hreeor more sections.

There are two onter rings, site sides of a rib, a, that projects. from the outer face of the inner ring.

The sections of B are held in place on the ring A by means of dowel-pins b b, that extend through and project from the rib a, as shown in figs. l-and 3. These pins fit into notches that are cut into the inner sides of the sections B, and prevent the latter, therefore, from being displaced on the rib.

The joints of the several sections of the two sets of rings are broken.

The pins b are B, placed against oppo-v fitted through the rib a, and are,

therefore, much longer than they would be if fitted into the rib separately from both sides. f

One pin holds, therefore, two sections of outside rings, and, if it gets loose, it cannot work ont, while the' longer fiber makes it more tough and tenacious lthan the short ones; still the pins cau be readily taken out-, -it desired, for grinding the edges' of the rings, and similar purposes.

From the inner face of the ring A project ribs or webs c c, which are tapering toward the ends, as shown. in figs. 4, 5, and 6.

D is the spring for forcing the rings apart. VIt has ears d dat its ends', which straddle the webs c c, on

two sections of the ring A, and other ears e, in the' middie, which straddle the web c of the third section of A.

The spring serves thus to press against the middle portion of each section of the ring A, and to thereby apply uniform pressure to every portion of the pistonpacking.

notched, to retain said ends, and to prevent the spring from slipping ou said webs, and to balance the spring, so that the rings may he fi'eel to movcon the piston.

By having the webs c 'made tapering, the same are adapted to springs of different sizes, and they make the whole packing tighter. The rings, it will he seen, are free to rotate ou the pistou, which causes ther-ings and cylinders to wearv more smoothly,

Having thus describednly invention,

I claim as new and desire to secure by Letters Patent- 1'. The sectional ring A, provided with the outer rib a, projecting double dowel-pius b, and tapering webs c, as set forth, for the purposes specified.

. 2. Thespring D, having the cars (Zand e, to straddle the webs of the sectional ring A, as set forth for the purpose of holding said ring in place, as specified. j

3. The duplicate sectional rings B, in combination with the rib a oftherifug A, and the dowel-pins b, suhs'tantially'as shown and described.

\Vitnesses: JOHN GATES.

ALANsoN SMlTH, SAM. A. MORELAND.

The webs that receive the ends of the spring are 

